Home / 12,939.18-19,411.24-4,171.74

Finding the Fourth Proportional to 12,939.18, 19,411.24 and 4,171.74

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Solution

The fourth proportional to 12,939.18, 19,411.24 and 4,171.74 is: 6,258.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,939.18 : 19,411.24 = 4,171.74 : x
  2. Step 2: Convert to fraction form
    12,939.18/19,411.24 = 4,171.74/x
  3. Step 3: Cross multiply
    12,939.18x = 19,411.24 × 4,171.74
  4. Step 4: Simplify right side
    12,939.18x = 80,978,646.36
  5. Step 5: Solve for x
    x = 80,978,646.36/12,939.18
  6. Step 6: Final answer
    x = 6,258.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.